Christmas tree stand



FIG. 1 is a perspective view of a christmas tree stand embodying my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof, the side opposite being a mirror image of the side shown; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a christmas tree stand, as shown and described. 